A method for an access service network gateway (ASN-GW) to provide multicast and broadcast services (MBSs) through a plurality of base stations (BSs) in an MBS zone. The method includes: generating a plurality of synchronization maps (SYNC MAPs) including synchronization information for the BSs to generate MBS data frames; and transmitting to the BSs the generated SYNC MAPs, one in each of a plurality of schedule intervals.
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1. A method for an access service network gateway (ASN-GW) to provide multicast and broadcast services (MBSs) through a plurality of base stations (BSs) in an MBS zone, the method comprising: generating, by the ASN-GW, a plurality of synchronization maps (SYNC MAPS) including synchronization information for synchronizing MBS data frames to be generated by the BSs; and transmitting, by the ASN-GW, to the BSs the generated SYNC MAPs, one in each of a plurality of schedule intervals, wherein when a first one of the SYNC MAPs transmitted in a first one of the schedule intervals is not received by one of the BSs, the transmitting further comprises retransmitting the first one of the SYNC MAPs in the first one of the schedule intervals; and the first one of the plurality of SYNC MAPs includes a transmission time of a second one of the plurality of SYNC MAPs, and at least one of the BSs determines an arrival time range for the second one of the plurality SYNC MAPs based on the transmission time of the second one of the plurality SYNC MAPs and a delay tolerance.
An access service network gateway (ASN-GW) manages multicast/broadcast services (MBS) to base stations (BS) within an MBS zone. The ASN-GW generates synchronization maps (SYNC MAPs) containing timing information for the BSs to synchronize MBS data frame generation. These SYNC MAPs are sent to the BSs at scheduled intervals. If a BS misses a SYNC MAP, the ASN-GW retransmits it within the same interval. Each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, allowing each BS to calculate a time window based on an allowed delay to expect the arrival of the *next* SYNC MAP.
2. The method of claim 1 , wherein the generating further comprises including, in a current one of the SYNC MAPs, a transmission time of a next one of the SYNC MAPs.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, further includes including the scheduled transmission time of the *next* SYNC MAP inside the *current* SYNC MAP to help a receiving base station (BS) anticipate the next SYNC MAP's arrival.
3. The method of claim 1 , wherein the generating further comprises including, in each of the SYNC MAPs, a different SYNC MAP sequence number to identify the SYNC MAPs.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, further includes assigning a unique sequence number to each SYNC MAP to allow the base stations (BS) to distinguish and track them, ensuring proper synchronization.
4. The method of claim 1 , wherein the generating further comprises including synchronization ruler information in each of the SYNC MAPs.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, further includes synchronization ruler information in each SYNC MAP. This provides a timing reference or scale for the base stations (BS) to precisely align their data frame generation.
5. The method of claim 1 , wherein the generating further comprises including synchronization timing information in each of the SYNC MAPs.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, further includes detailed synchronization timing information within each SYNC MAP, enabling the base stations (BS) to precisely coordinate their broadcast transmissions.
6. The method of claim 1 , wherein the transmitting further comprises transmitting the SYNC MAPs based on a unicast scheme.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, uses a *unicast* scheme to send SYNC MAPs, meaning each SYNC MAP is individually addressed and sent directly to each base station (BS).
7. The method of claim 1 , wherein the transmitting further comprises transmitting the SYNC MAPs based on a multicast scheme.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, and a missed SYNC MAP is retransmitted, uses a *multicast* scheme to send SYNC MAPs, meaning each SYNC MAP is sent to a group address so that many base stations (BS) can receive one SYNC MAP at a time.
8. The method of claim 1 , wherein the retransmitting further comprises retransmitting the first one of the SYNC MAPs based on an automatic repeat request (ARQ) scheme or a hybrid automatic repeat request (HARQ) scheme.
The method for an access service network gateway (ASN-GW) to provide multicast/broadcast services (MBS) through base stations (BS) where synchronization maps (SYNC MAPs) are generated and transmitted to base stations (BS) at scheduled intervals, retransmits missed SYNC MAPs using an automatic repeat request (ARQ) or hybrid automatic repeat request (HARQ) scheme to ensure reliable delivery. This involves the base station (BS) positively acknowledging the receipt of the SYNC MAP, or requesting its retransmission if an error is detected or no acknowledgement is sent by the base station (BS).
9. An access service network gateway (ASN-GW) for providing multicast and broadcast services (MBSs) through a plurality of base stations (BSs) in an MBS zone, the ASN-GW comprising: a processor configured to generate a plurality of synchronization maps (SYNC MAPs), the SYNC MAPs including synchronization information for synchronizing MBS data frames to be generated by the BSs; and an input/output (I/O) device configured to transmit to the BSs the generated SYNC MAPs, one in each of a plurality of schedule intervals, wherein when a first one of the SYNC MAPs transmitted in a first one of the schedule intervals is not received by one of the BSs, the input/output (I/O) device retransmits the first one of the SYNC MAPs in the first one of the schedule intervals; and the first one of the plurality of SYNC MAPs includes a transmission time of a second one of the plurality of SYNC MAPs, and at least one of the BSs determines an arrival time range for the second one of the plurality SYNC MAPs based on the transmission time of the second one of the plurality SYNC MAPs and a delay tolerance.
An access service network gateway (ASN-GW) provides multicast/broadcast services (MBS) to base stations (BS) within an MBS zone. It includes a processor that generates synchronization maps (SYNC MAPs) containing timing information for the BSs to synchronize MBS data frame generation. An I/O device transmits these SYNC MAPs to the BSs at scheduled intervals. If a BS misses a SYNC MAP, the I/O device retransmits it within the same interval. Each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, allowing each BS to calculate a time window based on an allowed delay to expect the arrival of the *next* SYNC MAP.
10. A method for a base station (BS) to generate multicast and broadcast service (MBS) data frames, the method comprising: receiving, from an access service network gateway (ASN-GW), a plurality of synchronization maps (SYNC MAPs) in ones of a plurality of schedule intervals, one of the SYNC MAPs being received in each of the ones of the schedule intervals; and generating, by the BS, the MBS data frames based on the received SYNC MAPs, wherein when a first one of the SYNC MAPs transmitted by the ASN-GW in a first one of the schedule intervals is not received by the BS, the BS requests the ASN-GW to retransmit the first one of the SYNC MAPs; and the first one of the plurality of SYNC MAPs includes a transmission time of a second one of the plurality of SYNC MAPs, and the receiving comprises determining an arrival time range for the second one of the plurality SYNC MAPs based on the transmission time of the second one of the plurality SYNC MAPs and a delay tolerance.
A base station (BS) generates multicast/broadcast service (MBS) data frames by receiving synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) at scheduled intervals. It generates MBS data frames based on these SYNC MAPs. If the BS misses a SYNC MAP, it requests retransmission from the ASN-GW. Each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, allowing the BS to calculate a time window based on an allowed delay to expect the arrival of the *next* SYNC MAP.
11. The method of claim 10 , wherein the determining further comprises determining the transmission time of the second one of the plurality SYNC MAPs to be a lower bound for the arrival time range.
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) where each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, calculates the *earliest* arrival time of the next SYNC MAP to be the scheduled transmission time of the *next* SYNC MAP to help set a reasonable expectation of the next SYNC MAP arrival.
12. The method of claim 10 , wherein the determining further comprises calculating a sum of the transmission time of the second one of the plurality SYNC MAPs and the delay tolerance as an upper bound for the arrival time range.
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) where each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, calculates the *latest* arrival time of the next SYNC MAP by adding the scheduled transmission time to an allowed delay to help set a reasonable expectation of the next SYNC MAP arrival.
13. The method of claim 10 , wherein when the BS does not receive the second one of the plurality of SYNC MAPs in the determined arrival time range, the method further comprises: requesting a retransmission of the second one of the plurality of SYNC MAPs.
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) where each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, if the BS does not receive a SYNC MAP within the calculated arrival time range (based on the expected transmission time and delay tolerance), the BS requests a retransmission of that SYNC MAP.
14. The method of claim 10 , further comprising: receiving the first one of the plurality of SYNC MAPs in a first one of the plurality of schedule intervals; and generating, based on the first one of the plurality of SYNC MAPs, the MBS data frames in a second of the plurality of schedule intervals contiguous to the first one of the plurality of schedule intervals.
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) at scheduled intervals, includes receiving a SYNC MAP and then generating MBS data frames in the immediately following scheduled interval. This ensures that the data frames are synchronized with the information contained in the received SYNC MAP.
15. The method of claim 10 , wherein when the BS does not receive a SYNC MAP in a first one of the plurality of schedule intervals, the method further comprises: keeping silent in a second one of the plurality of schedule intervals contiguous to the first one of the plurality of schedule intervals.
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) at scheduled intervals, includes remaining silent (i.e., not transmitting any data) in the time interval immediately following a missed SYNC MAP, ensuring the BS does not transmit unsynchronized or potentially incorrect data.
16. The method of claim 10 , wherein the generating further comprises: generating downlink maps (DL-MAPs) including MBS map information elements (MBS-MAP-IEs), and MBS maps (MBS-MAPs) including MBS data information elements (MBS-DATA-IEs).
The method for a base station (BS) to generate multicast/broadcast service (MBS) data frames by receiving and requesting retransmissions of synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) at scheduled intervals, includes generating downlink maps (DL-MAPs) that contain MBS map information elements (MBS-MAP-IEs) AND generating MBS maps (MBS-MAPs) that contain MBS data information elements (MBS-DATA-IEs). These maps and information elements define the structure and content of the multicast/broadcast transmissions.
17. A base station (BS) for providing multicast and broadcast services (MBSs), the BS comprising: an input/output (I/O) device configured to receive, from an access service network gateway (ASN-GW), a plurality of synchronization maps (SYNC MAPs) in ones of a plurality of schedule intervals, one of the SYNC MAPs being received in each of the ones of the schedule intervals; and a processor configured to generate data frames for the MBSs based on the received SYNC MAPs, wherein when a first one of the SYNC MAPs transmitted by the ASN-GW in a first one of the schedule intervals is not received by the BS, the BS requests the ASN-GW to retransmit the first one of the SYNC MAPs; and the first one of the plurality of SYNC MAPs includes a transmission time of a second one of the plurality of SYNC MAPs, and the processor is further configured to determine an arrival time range for the second one of the plurality SYNC MAPs based on the transmission time of the second one of the plurality SYNC MAPs and a delay tolerance.
A base station (BS) for providing multicast/broadcast services (MBS) includes an I/O device that receives synchronization maps (SYNC MAPs) from an access service network gateway (ASN-GW) at scheduled intervals. A processor generates data frames for MBS based on the received SYNC MAPs. If the BS misses a SYNC MAP, it requests retransmission from the ASN-GW. Each SYNC MAP includes the scheduled transmission time of the *next* SYNC MAP, and the processor calculates a time window based on an allowed delay to expect the arrival of the *next* SYNC MAP.
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April 16, 2009
July 30, 2013
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